TalkPHP - php5

Ill start off by saying i think this would be the place to post this ;) Also if this is not meant to be posted on this forum feel free to delete it :p

Well i am working on a private project (not a forum but something for my self) and i am coding in php5 i know how to do basic OOP in php4 but i am trying to learn a lot about php5 and there are something i am having issues with finding on the web. ill do it in points.

(note this is not really code just mockup to try and show you what i mean)

1) Would this be logical in making a database layer.

PHP Code:


		
			


abstract class driver {





protected function connect (perms here) {



mysql_connect()



}





}





class db extends driver {





public function connect(perms here) {





parent::connect(perms here);





}

if its not logical what would be the best way to go about it?

2) when do you use static/final etc.. keywords as in my coding i have never seen the need for it or whens it best to use it.

3) When needing to use other classes in a class is it best to do it this way or is there a better way?

PHP Code:


		
			


class foo {





private $see = NULL;





public function loo() {





global $see;





$this->see = &$see;





}





}





class see {





code here ....





}





$see = new see;

So that's all i want to know right now also if you have any other tips for coding in php5 oo i am all ears.